I have been using it on 4 computers for a week and a half. I have no complaints and some surprises. I test like most here with my own crappy malware but one thing that I found easy is Malwarebytes support forum. In it members post their new samples with their Virustotal findings for each AV. If you spend some time, and I have, it doesnt take long to see who stands out and who doesnt. It also will show which type of malware some do better or worse at. I know, I know, before you give me 500 reasons as to this and that, let me say for me, this is real world testing done, by a multitude of people. Not one testing site, not one set of samples. I like it. My surprise is Dr Web. It is coming in very well in finding even new samples that say only 6 others detect. Trojans are its specialty. This isnt earth shattering news, but it does confirm what I had started to believe and that is this vendor is making strong strides in malware protection. I see it. I know it. A pleasant surprise for this paying and satisfied customer.